【填空题】
48.三相压缩电机会出现哪些常见故障?*简答题*___
查看试卷,进入试卷练习
微信扫一扫,开始刷题
[1]、电源缺相而烧毁压缩机电机;[2]、三相不平衡使压缩机电机运行不正常 ;[3]、反相,这对旋转式压缩机有很大的危害。
相关试题
【填空题】
49.怎样判断相线或N线断线?*简答题*___
【填空题】
50.交流断电后,应急不能转换,应急灯不亮怎样判断故障?*简答题*___
【填空题】
51.说明19K型车辆影视点播系统的组成?*简答题*___
【填空题】
52.蓄电池不导电的原因有哪些?*简答题*___
【填空题】
53.感应子发电机电压低的原因有哪些?*简答题*___
【填空题】
54.电力线1、2路其中仅仅一路有故障应如何处理?*简答题*___
【填空题】
55.运行中感应子发电机产生高温的原因是什么?[10.0分]*简答题*___
【填空题】
56.更换 主整流二极管应注意什么?*简答题*___
【填空题】
57.康尼塞拉门有电有气时用三角钥匙操作装置不能打开和关闭车门的原因是什么? *简答题*___
【填空题】
58.DC600V供电系统有哪些优点?*简答题*___
【填空题】
59.空调机组中电机须具备哪些性能要求?*简答题*___
【填空题】
60.感应子发电机常见故障有哪些?*简答题*___
【填空题】
61.塞拉门日常应做哪些维修保养? *简答题*___
【填空题】
62.如何判断制冷系统制冷剂不足?*简答题*___
【填空题】
63.如何判断制冷系统制冷剂过多?*简答题*___
【填空题】
64.对DC600V供电车辆电力连接器摘解作业有何要求?*简答题*___
【填空题】
65.25T型客车综合控制柜具备哪六大功能?*简答题*___
【填空题】
66.制冷系统运行中机组突然停机的主要原因有哪些?*简答题*___
【填空题】
67.三相压缩机电机有哪几种启动方式?*简答题*___
【填空题】
68.电子显示屏全部死机如何处理?*简答题*___
【填空题】
69.显示屏自动报站不正常应如何处理?*简答题*___
【填空题】
70.康尼塞拉门未关到位即自动返回原因是什么? *简答题*___
【填空题】
71.TFX1型电子防滑器的出库质量要求是什么?*简答题*___
【填空题】
72.电气控制柜的配线出库质量要求是什么?*简答题*___
【填空题】
73.DC600V供电客车的逆变器输出电压与频率规定是多少?*简答题*___
【填空题】
74.车厢级电气设备监控网络的出库质量要求是什么?*简答题*___
【填空题】
75.列车级电气设备监控网络的出库质量要求是什么?*简答题*___
【填空题】
76.行车安全监测装置的出库质量要求是什么?*简答题*___
【填空题】
77.烟火报警器的出库质量要求是什么?*简答题*___
【填空题】
78.电茶炉的控制箱检修须符合什么要求? *简答题*___
【填空题】
79.25T 型客车发生火情时有哪些应急对策?*简答题*___
【填空题】
80.车载安全监测诊断系统的显示屏故障有哪些?如何处理?*简答题*___
【填空题】
1.DC600V供电列车发生机车跳闸或无法送电应如何处理?*论述题*___
【填空题】
2.DC600V供电列车的DC110V电池全列严重亏损,应如何处理?*论述题*___
【填空题】
3.DC600V供电列车单车出现主空开Q1\Q2跳闸应作如何处理?*论述题*___
【填空题】
4.列车运行途中DC600V供电客车综合控制柜电源开关置于自动位1路和2路都不能上电应作如何处理?*论述题*___
【填空题】
5.列车运行途中DC600V供电客车综合控制柜电源开关置于试验位1路和2路都不能上电应作如何处理?*论述题*___
【填空题】
6.发生电气火警应如何处理?*论述题*___
【填空题】
7.TFXI型电子防滑器列车管压力大于200kPa,主机不能自动上电,手动按“诊断”或“显示”按钮也不能上电,电源[应急电源]电压表显示大于46V应如何处理?*论述题*___
【填空题】
8.列车管风压大于200kPa,电子防滑器主机不能自动上电;或主机已上电,但显示器不显示或显示“••”应如何处理?*论述题*___
推荐试题
【判断题】
抗战胜利后,国民党统治集团的根本目标是使中国恢复到战前的状态,继续走资本主义发展道路。
【判断题】
抗战胜利初期,中国民主同盟主张“以民主的方式争取民主,以合法地行动争取合法的地位”,企图走第三条道路。
【判断题】
1946年1月政治协商会议决议虽不是新民主主义性质的,但在一个时期内,是否忠实履行它,是人民衡量政治是非的重要尺度。
【判断题】
从1946年到1949年,中国共产党领导中国人民解放军,经过战略防御、战略相持、战略反攻三个阶段,最后打败了国民党,取得了解放战争的胜利。
【判断题】
《中国土地法大纲》是中国共产党制定和颁布的第一个土地改革法令,为打败蒋介石、建立新中国的建立奠定了深厚的群众基础。
【判断题】
国统区第二条战线的形成,表明在不仅在军事战线上,而且在政治战线上,国民党都打了败仗。
【判断题】
抗战胜利后,一些民主党派领导人所主张的“中间路线”实质上就是资产阶级共和国方案,是旧民主主义的道路。
【判断题】
内战爆发后,客观形势决定了人民没有走中间路线的余地,原先主张走第三条道路的各党派都靠近了中国共产党,站到了新民主主义革命的立场上来。
【判断题】
1949年9月的召开的中国人民政治协商会议,是新中国的创建会议,《共同纲领》起着临时宪法的作用。
【判断题】
民主党派参加新政协并在新中国参政,标志着民主党派地位的根本变化,它们不再是在野党,成为了中国人民民主专政的参加者。
【判断题】
人民民主专政的新中国的创建,标志着近代以来中国面临的两大历史任务的基本完成。
【单选题】
A vSphere content library administrator is attempting to unpublish the content library, but the option is grayed out as shown in the Exhibit. Which statement identifies the reason for not being able to unpublish? ___
A. The content library is optimized for syncing over HTTP.
B. A synchronization operation is in progress with this content library.
C. There are active subscriptions on this content library.
D. Underlying storage for this content library is not accessible.
【单选题】
Assuming a mirrored (RAID-1) object configuration, how many hosts must contribute storage in a non-stretched VMware vSAN cluster to satisfy the “Number of failures to tolerate” policy option?“n” is the desired “Number of failures to tolerate” value for all options.___
A. 2n+2
B. 2n
C. 2n+1
D. 3n
【单选题】
An administrator must change the statistics level for short-term performance monitoring and wants to collect metrics for all counters, excluding minimum and maximum rollup values. What would be the statistics level?___
A. Level 3
B. Level 1
C. Level 2
D. Level 4
【单选题】
In a vSphere environment, two resource pools are created as shown in the Exhibit. Each VM is configured with 1 GB of memory. When the administrator tried to power on VM3, the operation failed. What action in the resource pool settings will allow VM3 to power on successfully?___
A. Deselect Expandable Memory Reservation
B. Increase Memory Reservation
C. Deselect Expandable CPU Reservation
D. Increase the CPU Reservation
【单选题】
Which network is used by vSphere HA when VMware vSAN is enabled?___
A. Management network
B. vSphere Replication network
C. vMotion network
D. VSAN network
【单选题】
Which statement is correct when migrating from a Windows vCenter Server to the vCenter Server Appliance 6.5?___
A. Migration deployments do not migrate local OS users from the source vCenter Server.
B. Migration deployments support DHCP on the source vCenter Server.
C. Migration deployments allow the source vCenter Server to remain powered on afterwards.
D. Migration deployments support custom ports for all services on the source vCenter Server.
【单选题】
How can failback of a recovered virtual machine in vSphere Replication be performed?___
A. No action required, because failback is automatically performed to the source site.
B. Configure a new replication in the reverse direction at the target site.
C. Disable or Stop the virtual machine replication on the source site.
D. Power off and unregister the virtual machine on the target site.
【单选题】
After upgrading the vSphere infrastructure and VMware Tools to version 6.5, the “Upgrade VM Compatibility” option is grayed out in the vSphere Web Client. (See Exhibit.) What must the administrator do to enable the VM compatibility upgrade?___
A. VMware Tools should be upgraded last.
B. Restart the ESXi server.
C. Uninstall VMware Tools.
D. Power off the virtual machine.
【单选题】
What availability mode does vCenter HA provide?___
A. Active-Passive
B. Active-Standby
C. Active-Active
D. Load-balanced
【单选题】
In which scenario will vSphere DRS balance resources when set to Fully Automated?___
A. Hosts with only shared storage
B. Hosts are part of a vSphere HA cluster
C. Power Management is set to Balanced on hosts
D. Hosts with shared or non-shared storage
【单选题】
What VMware technology can be used to move physical servers to the vSphere infrastructure?___
A. VMware vMotion
B. VMware Converter
C. VMware vCenter Server
D. OVF transport
【单选题】
Upgrading vCenter Server with Microsoft SQL database fails with the following error message: The DB User entered does not have the required permissions needed to install and configure vCenter Server with the selected DB. Please correct the following error(s): %sWhat could cause this error?___
A. incorrect ports open on SQL Server
B. incorrect database on the SQL server
C. incorrect compatibility mode on the SQL server
D. incorrect permission on SQL Server database
【单选题】
What is a potential downside of having more than four paths per datastore?___
A. limits the storage protocols
B. increases storage latency for VM
C. limits the path selection policies
D. limits the number of LUNs per host
【单选题】
Which feature facilitates the sharing of templates via vCenter Server?___
A. Content Library
B. OVF
C. folders
D. vApp
【单选题】
A vSphere Administrator is in the process of configuring replication for a virtual machine, but is not able to select the Recovery Point Objective (RPO) value of 5 minutes. Which statement could explain why the RPO value cannot be lower than 15 minutes?___
A. The OS quiescing option is selected for Replication options.
B. The virtual machine hardware version is not compatible.
C. The target and source sites use different types of datastores.
D. The target and source sites are not using VMFS 6.0 datastore.
【单选题】
What advanced parameter defines a custom isolation IP address for a vSphere HA cluster?___
A. das.usedefaultisolationaddress
B. das.isolationshutdowntimeout
C. fdm.isolationpolicydelaysec
D. das.isolationaddress
【单选题】
Which method is supported for backing up the virtual machine that contains vCenter Server?___
A. differential
B. incremental
C. full image
D. individual disks
【单选题】
A vSphere Administrator must ensure that a user is able to view and manage the system configuration in vSphere Web Client. In the vCenter Single Sign-On domain, which group should the user be a part of?___
A. SystemConfiguration.BashShellAdministrators
B. ComponentManager. Administrators
C. Administrators
D. SystemConfiguration.Administrators
【单选题】
What is the minimum number of hosts that must contribute capacity to a non-ROBO single site VMware vSAN cluster?___
【单选题】
Which guest operating system supports PVRDMA?___
A. Windows (32-Bit)
B. Linux (32-Bit)
C. Windows (64-Bit)
D. Linux (64-Bit)
【单选题】
What is the correct way to replace the certificate on an existing vCenter Server that is part of a vCenter HA configuration?___
A. Put the vCenter HA in Maintenance mode, replace the certificate, exit Maintenance mode.
B. Shut down Passive and Witness nodes and replace the certificate on the Active node.
C. Remove the Passive and Witness nodes, replace the certificate, reconfigure the cluster.
D. Replace the certificate while all nodes are participating in the cluster.
【单选题】
The vSphere Data Protection performance analysis results in the “Conditionally Passed” status. What can cause this condition?___
A. The results did not meet the minimum performance expectations.
B. The read, write, and seek tests were successful.
C. The read and write tests were successful but the seek test failed.
D. The read and write tests were successful but the seek test skipped.
【单选题】
A vSphere Administrator wants to reserve 0.5 Gbps for virtual machines on each uplink on a disturbed switch that has 10 uplinks. What is the quota that should be reserved for the network resource pool?___
A. 10 Gbps
B. 5 Gbps
C. 100 Gbps
D. 0.5 Gbps
【单选题】
A vSphere administrator manages a cluster which includes critical and non-critical virtual machines. The cluster requires different permissions for contractors and non-contractors. How can the administrator exclude the contractor group from some of the critical VMs?___
A. Apply permission for both contractors and non-contractors on the cluster level.
B. Apply permission for both contractors and non-contractors on the cluster level. Remove permission on the critical VMs for contractors.
C. Remove permission for contractors on the cluster level. Apply permission on the critical VMs for noncontractors.
D. Apply permission for both contractors and non-contractors on the VMs. Remove permission on the critical VMs for contractors.
【单选题】
In an ESXi 6.5 cluster only "NFS datastore has running or registered virtual machines" returns. A vSphere HA cluster with four hosts has admission control configured to tolerate one host failure. Which statement is true if a fifth host is added?___
A. CPU and Memory capacity will be set to 50%.
B. CPU and Memory capacity will be set to 30%.
C. CPU and Memory capacity will be set to 25%.
D. CPU and Memory capacity will be set to 20%.
【单选题】
Which command can be run to troubleshoot connectivity problems with vmkernal network interfaces?___
A. esxcli network
B. vmkping
C. net-status
D. vicfg-vmknic
【单选题】
What counter should an administrator check to determine if a virtual machine is ballooning?___
A. swapinRate
B. vmmemctltarget
C. swapped
D. vmmemctl
【单选题】
By default, how often is the vCenter vpx user password automatically changed?___
A. 15 days
B. 60 days
C. 30 days
D. 45 days
【单选题】
Which metric in the Exhibit would identify high latency for a virtual machine operating system?___
A. QAVG/cmd
B. KAVG/cmd
C. DAVG/cmd
D. GAVG/cmd